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Finding the Fourth Proportional to 998,258.60, 1,495,055.10 and 978,213.80

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Solution

The fourth proportional to 998,258.60, 1,495,055.10 and 978,213.80 is: 1,465,034.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,258.60 : 1,495,055.10 = 978,213.80 : x
  2. Step 2: Convert to fraction form
    998,258.60/1,495,055.10 = 978,213.80/x
  3. Step 3: Cross multiply
    998,258.60x = 1,495,055.10 × 978,213.80
  4. Step 4: Simplify right side
    998,258.60x = 1,462,483,530,580.38
  5. Step 5: Solve for x
    x = 1,462,483,530,580.38/998,258.60
  6. Step 6: Final answer
    x = 1,465,034.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.